package com.yuming.reggie.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.core.toolkit.IdWorker;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.yuming.reggie.common.BaseContext;
import com.yuming.reggie.common.CustomException;
import com.yuming.reggie.entity.*;
import com.yuming.reggie.mapper.OrderMapper;
import com.yuming.reggie.service.*;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.math.BigDecimal;
import java.time.LocalDateTime;
import java.util.List;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.stream.Collectors;

@Service
@Slf4j
public class OrderServiceImpl extends ServiceImpl<OrderMapper, Orders> implements OrderService {
    @Autowired
    private ShoppingCartService shoppingCartService;

    @Autowired
    private UserService userService;

    @Autowired
    private AddressBookService addressBookService;

    @Autowired
    private OrderDetailService orderDetailService;

/**
 * 用户下单
 * @param orders
 */
public void submit(Orders orders){
    //获得当前用户id
    Long userId = BaseContext.getCurrentId();

    //查询当前用户的购物车数据
    LambdaQueryWrapper<ShoppingCart> wrapper = new LambdaQueryWrapper<>();
    wrapper.eq(ShoppingCart::getUserId,userId);
    List<ShoppingCart> shoppingCarts = shoppingCartService.list(wrapper);
    if (shoppingCarts == null || shoppingCarts.size() == 0){
        throw new CustomException("购物车为空，不能下单");
    }
    //查询用户数据
    User user = userService.getById(userId);

    //查询地址数据
    Long addressBookId = orders.getAddressBookId();
    AddressBook addressBook = addressBookService.getById(addressBookId);
    if(addressBook == null){
        throw new CustomException("用户地址信息有误，不能下单");
    }
    long orderId = IdWorker.getId();//订单号

    AtomicInteger amount = new AtomicInteger(0);

    //组装订单明细信息
    List<OrderDetail> orderDetails = shoppingCarts.stream().map((item) -> {
        OrderDetail orderDetail = new OrderDetail();
        orderDetail.setOrderId(orderId);
        orderDetail.setNumber(item.getNumber());
        orderDetail.setDishFlavor(item.getDishFlavor());
        orderDetail.setDishId(item.getDishId());
        orderDetail.setSetmealId(item.getSetmealId());
        orderDetail.setName(item.getName());
        orderDetail.setImage(item.getImage());
        orderDetail.setAmount(item.getAmount());
        amount.addAndGet(item.getAmount().multiply(new BigDecimal(item.getNumber())).intValue());
        return orderDetail;
    }).collect(Collectors.toList());

    //组装订单数据
    orders.setId(orderId);
    orders.setOrderTime(LocalDateTime.now());
    orders.setCheckoutTime(LocalDateTime.now());
    orders.setStatus(2);
    orders.setAmount(new BigDecimal(amount.get()));//总金额
    orders.setUserId(userId);
    orders.setNumber(String.valueOf(orderId));
    orders.setUserName(user.getName());
    orders.setConsignee(addressBook.getConsignee());
    orders.setPhone(addressBook.getPhone());
    orders.setAddress((addressBook.getProvinceName() == null ? "" : addressBook.getProvinceName())
            + (addressBook.getCityName() == null ? "" : addressBook.getCityName())
            + (addressBook.getDistrictName() == null ? "" : addressBook.getDistrictName())
            + (addressBook.getDetail() == null ? "" : addressBook.getDetail()));
    //向订单表插入数据，一条数据
    this.save(orders);

    //向订单明细表插入数据，多条数据
    orderDetailService.saveBatch(orderDetails);

    //清空购物车数据
    shoppingCartService.remove(wrapper);
}
}

